A two-dimensional constant-weight sparse modulation code for volume holographic data storage  

作　　者：Hua-rong GU Liang-cai CAO Qing-sheng HE Guo-fan JIN 

机构地区：[1]State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua UniversiO,, Beijing 100084, China

出　　处：《Journal of Zhejiang University-Science C(Computers and Electronics)》2011年第5期430-435,共6页浙江大学学报C辑（计算机与电子（英文版）

基　　金：supported by the National Basic Research Program of China (No.2009CB724007);the National High-Tech R & D Program (863) of China (No.2009AA01Z112);the National Natural Science Foundation of China (No.60807005)

摘　　要：In order to simplify the threshold determination,reduce the inter-pixel cross-talk,and improve the storage density for high-density volume holographic data storage,a two-dimensional constant-weight sparse modulation code is proposed.The evaluation criteria and design rules are investigated based on the page-oriented optical data storage system.Coding parameters are optimized to achieve large channel capacities.An 8:16 modulation code is designed to reduce the raw bit error rate and its performances are experimentally evaluated.A raw bit error rate of the magnitude of 10 4 is obtained with a single-data-page storage and 10 3 with multiplexing.In order to simplify the threshold determination, reduce the inter-pixel cross-talk, and improve the storage density for high-density volume holographic data storage, a two-dimensional constant-weight sparse modulation code is proposed. The evaluation criteria and design rules are investigated based on the page-oriented optical data storage system. Coding parameters are optimized to achieve large channel capacities. An 8：16 modulation code is designed to reduce the raw bit error rate and its performanccs are experimentally evaluated. A raw bit error rate of the magnitude of 10^-4 is obtained with a single-data-page storage and 10^- 3 with multiplexing.

关 键 词：Volume holographic data storage Modulation codes Sparse codes Raw bit error rate Channel capacity 

分 类 号：O438.1[机械工程—光学工程]